Non-Hermitian Linear Electrooptic Effect in 3D materials
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909082724597760 |
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| author | Morgado, Tiago A. Rappoport, Tatiana G. Tsirkin, Stepan S. Lannebère, Sylvain Souza, Ivo Silveirinha, Mário G. |
| author_facet | Morgado, Tiago A. Rappoport, Tatiana G. Tsirkin, Stepan S. Lannebère, Sylvain Souza, Ivo Silveirinha, Mário G. |
| contents | Here, we present an in-depth theoretical analysis of the linear electrooptic effect in low-symmetry three-dimensional (3D) conductive materials with large Berry curvature dipoles. Our study identifies two distinct kinetic contributions to the linear electrooptic effect: a gyrotropic Hermitian (conservative) piece and a non-Hermitian term that can originate optical gain. We concentrate on the study of 3D materials belonging to the 32 ($D_3$) point group subject to a static electric bias along the trigonal axis. Our investigation shows that doped trigonal tellurium has promising properties, with its gyrotropic electrooptic response offering the potential for realizing electrically-biased electromagnetic isolators and inducing significant optical dichroism. Most notably, it is demonstrated that under sufficiently large static electric bias, tellurium's non-Hermitian electrooptic response may lead to optical gain. Using first-principles calculations, it is shown that n-doped tellurium is particularly promising, as it can host significantly larger Berry curvature dipoles than the more common p-doped tellurium. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_13764 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Non-Hermitian Linear Electrooptic Effect in 3D materials Morgado, Tiago A. Rappoport, Tatiana G. Tsirkin, Stepan S. Lannebère, Sylvain Souza, Ivo Silveirinha, Mário G. Optics Mesoscale and Nanoscale Physics Here, we present an in-depth theoretical analysis of the linear electrooptic effect in low-symmetry three-dimensional (3D) conductive materials with large Berry curvature dipoles. Our study identifies two distinct kinetic contributions to the linear electrooptic effect: a gyrotropic Hermitian (conservative) piece and a non-Hermitian term that can originate optical gain. We concentrate on the study of 3D materials belonging to the 32 ($D_3$) point group subject to a static electric bias along the trigonal axis. Our investigation shows that doped trigonal tellurium has promising properties, with its gyrotropic electrooptic response offering the potential for realizing electrically-biased electromagnetic isolators and inducing significant optical dichroism. Most notably, it is demonstrated that under sufficiently large static electric bias, tellurium's non-Hermitian electrooptic response may lead to optical gain. Using first-principles calculations, it is shown that n-doped tellurium is particularly promising, as it can host significantly larger Berry curvature dipoles than the more common p-doped tellurium. |
| title | Non-Hermitian Linear Electrooptic Effect in 3D materials |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2401.13764 |